Extended Data Fig. 7: Sensivity of meteoric water oxygen isotopic composition to formation temperature across a wide temperature range and the assumed rainfall δ18O value at sea level.
From: High-elevation Tibetan Plateau before India–Eurasia collision recorded by triple oxygen isotopes
a. Sensivity of meteoric water oxygen isotopic composition to formation temperature across a wide temperature range (125–450 °C). The mean and standard deviation (black line and grey bar) of the two quatz formation temperature datasets from Li et al.31 are shown across the top. Dashed line show the York regression confidence interval’s intercept with the Tibet meteoric water line derived from this work (Fig. 2a). The blue triangle represent our best estimate palaeo-meteoric δ18O value using the galena-sphalerite sulphur isotope temperature (240 °C). b. Sensivitiy of meteoric water oxygen isotopic composition to the assumed rainfall δ18O value at sea level. The mean and errors (black line and grey bar) of rainfall δ18O values used by Ding et al.8 (also used in this study), Ingalls et al.9, and Rowley and Currie7 are shown above, with an alternative higher estimate from Hren et al.26 based on modern data.
